Officers from Halifax Central neighbourhood policing team discovered 74 drug plants and growing equipment when they raided the former Friendly Inn in Boothtown Road in Boothtown, Halifax.

An investigation is now under way into who was running the operation.

Sergeant John Simpson, from the team, said he hoped the raid would help to show that police do act on information given to them by the public.

He urged residents to keep an eye out for any suspicious activity that could be linked to drugs production.

He said this could include people coming and going at derelict and unused buildings at odd times of the day and night.

He also asked people to let them know of any strong smells that could be linked to drugs.

Anyone who has information that might help police with their investigation into these plants or any other drug dealing in Calderdale can contact their local neighbourhood policing team via 0845 6060606 or by visiting www.westyorkshire.police.uk/npt.

People can also ring CrimeStoppers, where information can be passed on anonymously, on 0800 555111.

Support for people using drugs is available from the Basement Project, in Crossley Street, Halifax, by calling 01422 383063.